Move gesture/touch UMA logs into gesture provider

ui/events/gesture_detection/gesture_provider.h

Index: ui/events/gesture_detection/gesture_provider.h
diff --git a/ui/events/gesture_detection/gesture_provider.h b/ui/events/gesture_detection/gesture_provider.h
index 63bb90d915dc33fa3eea5eaa19f986ffae7988c3..79b3228c5465bedff3105dcaa86c1d25a045f8a2 100644
--- a/ui/events/gesture_detection/gesture_provider.h
+++ b/ui/events/gesture_detection/gesture_provider.h
@@ -10,6 +10,7 @@
 #include "ui/events/gesture_detection/gesture_detection_export.h"
 #include "ui/events/gesture_detection/gesture_detector.h"
 #include "ui/events/gesture_detection/gesture_event_data.h"
+#include "ui/events/gesture_detection/gesture_touch_uma_histogram.h"
 #include "ui/events/gesture_detection/scale_gesture_detector.h"
 #include "ui/events/gesture_detection/snap_scroll_controller.h"
 #include "ui/gfx/display.h"
@@ -101,6 +102,10 @@ class GESTURE_DETECTION_EXPORT GestureProvider {
 
   scoped_ptr<MotionEvent> current_down_event_;
 
+  // Create a GestureTouchUMAHistogram object to record some touch and gesture
+  // events

[tdresser, 2014/08/27 12:35:39]

Reword comment (the fact that we're instantiating an object is obvious, only
state what isn't obvious.

Something like:
// Logs information on touch and gesture events.

(Also, add a period at the end.)

[lanwei, 2014/08/27 23:31:59]

Done.

+  GestureTouchUMAHistogram umaHistogram;

[tdresser, 2014/08/27 12:35:38]

"Variable names are all lowercase, with underscores between words. Class member
variables have trailing underscores"

http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml?showone=Variab...

[lanwei, 2014/08/27 23:31:59]

Done.

+
   // Whether double-tap gesture detection is currently supported.
   bool double_tap_support_for_page_;
   bool double_tap_support_for_platform_;